EP1548415B1 - Sleeve for sensor for measurements in liquid such as liquid metals - Google Patents

Sleeve for sensor for measurements in liquid such as liquid metals Download PDF

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Publication number
EP1548415B1
EP1548415B1 EP04025932A EP04025932A EP1548415B1 EP 1548415 B1 EP1548415 B1 EP 1548415B1 EP 04025932 A EP04025932 A EP 04025932A EP 04025932 A EP04025932 A EP 04025932A EP 1548415 B1 EP1548415 B1 EP 1548415B1
Authority
EP
European Patent Office
Prior art keywords
carrier tube
liquid
tube according
starch
protein
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04025932A
Other languages
German (de)
French (fr)
Other versions
EP1548415A1 (en
Inventor
Jacques Plessers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Electro Nite International NV
Original Assignee
Heraeus Electro Nite International NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heraeus Electro Nite International NV filed Critical Heraeus Electro Nite International NV
Priority to PL04025932T priority Critical patent/PL1548415T3/en
Publication of EP1548415A1 publication Critical patent/EP1548415A1/en
Application granted granted Critical
Publication of EP1548415B1 publication Critical patent/EP1548415B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
    • G01K1/125—Protective devices, e.g. casings for preventing damage due to heat overloading for siderurgical use
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/12—Thermometers specially adapted for specific purposes combined with sampling devices for measuring temperatures of samples of materials
    • G01K13/125—Thermometers specially adapted for specific purposes combined with sampling devices for measuring temperatures of samples of materials for siderurgical purposes

Definitions

  • the invention relates to a carrier tube for sensors for measurement in metal or cryolite melts, in particular in cast iron, steel or copper melts.
  • an insulating sleeve for measuring lances is known, which is formed from a pressed mixture of cellulose and a binder.
  • the cellulosic material consists essentially of wood fibers or wood chips.
  • the object is achieved in that the initially characterized carrier tube is formed from a mixture of a vegetable fiber material with starch and / or protein. It is pressed or extruded.
  • a carrier tube is made of natural or natural material and is therefore environmentally friendly to dispose of.
  • it has also proven to be sufficiently stable in temperature to withstand the high temperatures of up to 1700 ° C at least during the removal of the measured values such that a measurement and the forwarding of the measurement signals can be carried out.
  • the vegetable fiber material is formed on a wood and / or cellulose basis.
  • the wood is present as shavings or wood flour.
  • the support tube additionally contains plastic and / or a lubricant.
  • the plastic may preferably be polypropylene, polyvinyl chloride, polyethylene or the like. Recycled plastic can also be used. It serves to improve the mechanical properties, in particular the increase in the breaking strength, so that the carrier tube is not damaged as possible, in particular during use before immersion in the melt.
  • the proportion of the fiber material is about 70% by weight, the content of starch and / or protein about 3 to 30% by weight and the proportion of plastic and / or lubricant about 1 to 15% by weight as a preferred composition.
  • the support tube has on its inside surface projections, in particular ribs, knobs or beads to better fix the measuring head, which is fixed in one end of the support tube.
  • the carrier tube can be produced by extrusion molding.
  • Such support tubes surprisingly have good resistance to liquid metal, withstand the high temperature longer than paperboard tubes, and they do not adhere to a lance as commonly used to hold the support tube in immersion in the hot melt.
  • the carrier tube according to the invention in a customary size can be extruded from a mixture of about 70% by weight of wood chips, about 27% by weight of malt as a binder and a Addition of polypropylene and a lubricant in the total amount of about 3% by weight.
  • a lubricant for example, standard lubricants for polyolefins and PVC such as ethylene-bis-stearamides, zinc stearates, paraffin waxes, or fatty acid-based lubricants such as metal stearates, amides or esters, and fluoroelastomers may be used.
  • the inside of the extruded tube is ribbed so that a gauge head to be held in the tube is pressed into a tube end and held under pressure between opposed ribs.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Laminated Bodies (AREA)

Abstract

A sensor carrier tube formed from a mixture of vegetable fiber material, starch and/or protein for measuring metal or cryolithic melts, especially cast iron, steel, or copper melts, formed from a mixture of vegetable fiber material, starch and/or protein.

Description

Die Erfindung betrifft ein Trägerrohr für Sensoren zur Messung in Metall- oder Kryolithschmelzen, insbesondere in Gusseisen-, Stahl- oder Kupferschmelzen.The invention relates to a carrier tube for sensors for measurement in metal or cryolite melts, in particular in cast iron, steel or copper melts.

Aus dem Deutschen Gebrauchsmuster DE 7507605 U1 ist eine Isolierhülse für Messlanzen bekannt, die aus einem gepressten Gemisch aus Cellulose und einem Bindemittel gebildet ist. Das Cellulosematerial besteht im wesentlichen aus Holzfasern oder Holzspänen.From the German utility model DE 7507605 U1 For example, an insulating sleeve for measuring lances is known, which is formed from a pressed mixture of cellulose and a binder. The cellulosic material consists essentially of wood fibers or wood chips.

Gegenstände, die aus Holzfasern gepresst oder extrudiert sind, sind hinlänglich bekannt und werden im täglichen Leben als Platten in Gebäuden, als Türblätter, Strukturelemente, Isolierungen oder auch als Verpackungsmaterial und für eine Reihe anderer Anwendungen eingesetzt. Derartige Platten und Profilteile sind beispielsweise aus WO 90/14935 A1 oder aus WO 95/04111 A1 bekannt.Articles pressed or extruded from wood fibers are well known and are used in everyday life as panels in buildings, as door panels, structural elements, insulators or even as packaging material and for a number of other applications. Such plates and profile parts are made, for example WO 90/14935 A1 or off WO 95/04111 A1 known.

In der Prozessmesstechnik in metallurgischen Werken werden Messsonden in einer großen Anzahl regelmäßig benötigt, um die Qualität der Metallschmelzen laufend zu überprüfen. Dazu werden überwiegend Sensoren eingesetzt, die in die Hochtemperaturschmelze eingetaucht werden. Diese Sensoren sind nach einer Messung verbraucht und werden für die nächste Messung durch neue Sensoren ersetzt. Die Sensoren werden üblicherweise an Rohren aus Pappe gehalten. Diese Rohre verbrennen zumindest teilweise und sind nach der Messung unbrauchbar.In process metrology in metallurgical plants, a large number of probes are required on a regular basis to continuously check the quality of molten metals. For this purpose, predominantly sensors are used, which are immersed in the high-temperature melt. These sensors are consumed after a measurement and replaced with new sensors for the next measurement. The sensors are usually held on cardboard pipes. These tubes burn at least partially and are unusable after the measurement.

Es besteht der Bedarf nach preiswerten Trägern für Sensoren in aggressiven Hochtemperaturschmelzen, die einerseits eine ausreichende Haltbarkeit aufweisen, um die gewünschte Messung zu ermöglichen und die andererseits umweltfreundlich entsorgt werden können.There is a need for inexpensive carriers for sensors in aggressive high-temperature melts, on the one hand have sufficient durability to allow the desired measurement and the other can be disposed of environmentally friendly.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass das eingangs charakterisierte Trägerrohr aus einer Mischung eines pflanzlichen Fasermaterials mit Stärke und/oder Protein gebildet ist. Es wird gepresst oder extrudiert. Ein derartiges Trägerrohr besteht aus natürlichem oder naturnahen Material und ist daher umweltfreundlich zu entsorgen. Erstaunlicherweise hat es sich auch als ausreichend temperaturstabil erwiesen um den hohen Temperaturen von bis zu 1.700°C zumindest während der Entnahme der Messwerte derart Stand zu halten, dass eine Messung und die Weiterleitung der Messsignale erfolgen kann.According to the invention the object is achieved in that the initially characterized carrier tube is formed from a mixture of a vegetable fiber material with starch and / or protein. It is pressed or extruded. Such a carrier tube is made of natural or natural material and is therefore environmentally friendly to dispose of. Surprisingly, it has also proven to be sufficiently stable in temperature to withstand the high temperatures of up to 1700 ° C at least during the removal of the measured values such that a measurement and the forwarding of the measurement signals can be carried out.

Vorzugsweise ist das pflanzliche Fasermaterial auf Holz- und/oder Cellulosebasis gebildet. Insbesondere ist es vorteilhaft, dass das Holz als Späne oder Holzmehl vorliegt. Es kann zweckmäßig sein, dass das Trägerrohr zusätzlich Kunststoff und/oder ein Gleitmittel enthält. Der Kunststoff kann vorzugsweise Polypropylen, Polyvenylchlorid, Polyethylen oder ähnliches sein. Auch recycelter Kunststoff kann verwendet werden. Es dient der Verbesserung der mechanischen Eigenschaften, insbesondere der Erhöhung der Bruchfestigkeit, so dass das Trägerrohr insbesondere beim Gebrauch vor dem Eintauchen in die Schmelze möglichst nicht beschädigt wird.Preferably, the vegetable fiber material is formed on a wood and / or cellulose basis. In particular, it is advantageous that the wood is present as shavings or wood flour. It may be expedient that the support tube additionally contains plastic and / or a lubricant. The plastic may preferably be polypropylene, polyvinyl chloride, polyethylene or the like. Recycled plastic can also be used. It serves to improve the mechanical properties, in particular the increase in the breaking strength, so that the carrier tube is not damaged as possible, in particular during use before immersion in the melt.

Der Anteil des Fasermaterials beträgt etwa 70 Gew-%, der Anteil an Stärke und/oder Protein etwa 3 bis 30 Gew-% und der Anteil an Kunststoff und/oder Gleitmittel etwa 1 bis 15 Gew-% als bevorzugte Zusammensetzung.The proportion of the fiber material is about 70% by weight, the content of starch and / or protein about 3 to 30% by weight and the proportion of plastic and / or lubricant about 1 to 15% by weight as a preferred composition.

Zweckmäßig ist es, dass das Trägerrohr auf seiner Innenseite Oberflächenvorsprünge, insbesondere Rippen, Noppen oder Wülste aufweist, um den Messkopf besser fixieren zu können, der in einem Ende des Trägerrohrs befestigt ist.It is expedient that the support tube has on its inside surface projections, in particular ribs, knobs or beads to better fix the measuring head, which is fixed in one end of the support tube.

Das Trägerrohr kann durch Strangpressverfahren hergestellt werden. Derartige Trägerrohre haben überraschenderweise eine gute Widerstandsfähigkeit gegenüber flüssigem Metall, sie halten der hohen Temperatur länger Stand als Papprohre, und sie bleiben nicht an einer Lanze anhaften, wie sie üblicherweise benutzt wird, um das Trägerrohr beim Eintauchen in die heiße Schmelze zu halten.The carrier tube can be produced by extrusion molding. Such support tubes surprisingly have good resistance to liquid metal, withstand the high temperature longer than paperboard tubes, and they do not adhere to a lance as commonly used to hold the support tube in immersion in the hot melt.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung beschrieben.Hereinafter, an embodiment of the invention will be described.

Das erfindungsgemäße Trägerrohr in fachüblicher Grösse kann extrudiert werden aus einer Mischung aus etwa 70 Gew-% Holzspänen, etwa 27 Gew-% Malz als Bindemittel und einem Zusatz von Polypropylen und einem Gleitmittel in der Gesamtmenge von etwa 3 Gew-%. Als Gleitmittel können beispielsweise Standardgleitmittel für Polyolefine und PVC, wie Ethylen-Bis-Stearamide, Zinkstearate, Paraffinwachse, oder Fettsäure basierte Gleitmittel, wie Metallstearate, Amide oder Ester sowie Fluorelastomere verwendet werden. Die Innenseite des extrudierten Rohres ist mit Rippen versehen, so dass ein in dem Rohr zu haltender Messkopf in ein Rohrende hineingepresst und unter Druck zwischen sich gegenüberliegenden Rippen gehalten wird.The carrier tube according to the invention in a customary size can be extruded from a mixture of about 70% by weight of wood chips, about 27% by weight of malt as a binder and a Addition of polypropylene and a lubricant in the total amount of about 3% by weight. As the lubricant, for example, standard lubricants for polyolefins and PVC such as ethylene-bis-stearamides, zinc stearates, paraffin waxes, or fatty acid-based lubricants such as metal stearates, amides or esters, and fluoroelastomers may be used. The inside of the extruded tube is ribbed so that a gauge head to be held in the tube is pressed into a tube end and held under pressure between opposed ribs.

Claims (7)

  1. Carrier tube for sensors for measurement in metal or cryolite melts, in particular in cast iron, steel or copper melts, characterized in that it is formed from a mixture of a vegetable fibre material with starch and/or protein.
  2. Carrier tube according to Claim 1, characterized in that the vegetable fibre material is based on wood and/or cellulose.
  3. Carrier tube according to Claim 2, characterized in that the wood is present in the form of chips or wood flour.
  4. Carrier tube according to any of Claims 1 to 3, characterized in that it also contains plastic and/or lubricant in addition to the fibre material and starch and/or protein.
  5. Carrier tube according to Claim 4, characterized in that the proportion of the fibre material is about 70% by weight.
  6. Carrier tube according to Claim 4, characterized in that the proportion of starch and/or protein is about 3 to 30% by weight and the proportion of plastic and lubricant is about 1 to 15% by weight.
  7. Carrier tube according to any of Claims 1 to 6, characterized in that it has surface projections, in particular ribs, knobs or beads, on its inside.
EP04025932A 2003-12-17 2004-11-02 Sleeve for sensor for measurements in liquid such as liquid metals Expired - Lifetime EP1548415B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04025932T PL1548415T3 (en) 2003-12-17 2004-11-02 Sleeve for sensor for measurements in liquid such as liquid metals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10359449 2003-12-17
DE10359449A DE10359449B3 (en) 2003-12-17 2003-12-17 A sensor carrier tube formed from a mixture of vegetable fiber material, starch and/or protein useful for measuring metal or cryolithic melts, especially cast iron, steel, or copper melts

Publications (2)

Publication Number Publication Date
EP1548415A1 EP1548415A1 (en) 2005-06-29
EP1548415B1 true EP1548415B1 (en) 2008-01-30

Family

ID=34112166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04025932A Expired - Lifetime EP1548415B1 (en) 2003-12-17 2004-11-02 Sleeve for sensor for measurements in liquid such as liquid metals

Country Status (15)

Country Link
US (1) US7488350B2 (en)
EP (1) EP1548415B1 (en)
JP (1) JP4672344B2 (en)
KR (1) KR20050061296A (en)
CN (1) CN100375893C (en)
AT (1) ATE385313T1 (en)
AU (1) AU2004224900B2 (en)
BR (1) BRPI0405771A (en)
CA (1) CA2485057A1 (en)
DE (2) DE10359449B3 (en)
MX (1) MXPA04012257A (en)
PL (1) PL1548415T3 (en)
RU (1) RU2342645C2 (en)
UA (1) UA82193C2 (en)
ZA (1) ZA200410120B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029220B4 (en) 2005-06-22 2007-03-15 Heraeus Electro-Nite International N.V. Carrier tube for sensors or samplers
DE102007032694A1 (en) 2007-07-13 2009-01-22 Kutzner, Dieter, Dipl.-Ing. Protective cover for a temperature measuring element
CN103695595A (en) * 2013-12-12 2014-04-02 辽宁宏威新型复合材料有限公司 Production method of sublance composite probe guide tube for converter steelmaking

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Also Published As

Publication number Publication date
CA2485057A1 (en) 2005-06-17
US7488350B2 (en) 2009-02-10
ATE385313T1 (en) 2008-02-15
MXPA04012257A (en) 2005-06-22
JP2005205495A (en) 2005-08-04
JP4672344B2 (en) 2011-04-20
US20050132827A1 (en) 2005-06-23
UA82193C2 (en) 2008-03-25
AU2004224900A1 (en) 2005-07-07
AU2004224900B2 (en) 2008-01-24
BRPI0405771A (en) 2005-09-20
PL1548415T3 (en) 2008-07-31
EP1548415A1 (en) 2005-06-29
RU2004136924A (en) 2006-06-10
DE502004006100D1 (en) 2008-03-20
KR20050061296A (en) 2005-06-22
DE10359449B3 (en) 2005-03-03
ZA200410120B (en) 2005-07-19
CN100375893C (en) 2008-03-19
RU2342645C2 (en) 2008-12-27
CN1628925A (en) 2005-06-22

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